The Old Skool Cartridge Cleaner is the quickest and easiest way to clean your games for Nintendo, Super Nintendo, Sega Genesis, Sega Master System N64, Atari, NeoGeo and more. Just add a couple drops of Isopropyl Alcohol (Rubbing Alcohol) to the wet side and rub it back in forth across the cartridge contacts, then use the dry side and rub it back and forth again to dry it, Repeat as necessary.